<template>
    <div class="list" ref="wrapper">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                   <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                   <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
              <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
            </div>
        </div>
      </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      // alert(city)
      // this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      // console.log(this.letter)
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        // console.log(element)
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>
<style lang="stylus" scoped>
  @import '~styles/variable.styl'
    .border-topbottom
      &:before
        border-color #ccc
      &:after
        border-color #ccc
    .border-bottom
      &:before
        border-color #ccc
    .list
      overflow hidden
      position absolute
      top 1.58rem
      left 0
      right 0
      bottom 0
      .title
        line-height .54rem
        background #eee
        padding-left .2rem
        color #666
        font-size .26rem
      .button-list
        padding .1rem .6rem .1rem.1rem
        overflow hidden
        .button-wrapper
          float left
          width 33.3%
          .button
            text-align center
            padding .1rem 0
            margin .1rem
            border .02rem solid #ccc
            border-radius .06rem
      .item-list
        line-height .75rem
        padding-left .2rem
</style>
